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{No Model. 3 SheetsSheet 1.

A. STROTT.

GRAIN WINNOWER.

N0. 312,929. Patented Feb. 24, 1885.

WITNESSES: INVENTOR ATTO NEYS.

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(No Model.) 3 Sheets-Sheet 2.

A.-STROTT.

4 GRAIN WINNOWER. v No. 312,929. Patented Feb. 24, 1885..

WITNESSES INVENTOR ,QW@Z%. S

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N. PETERS, Pnuw-umo ner. Washington. D. c,

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ADAM STROTT, OF NEWV BRUNSVVIGK, NEXV JERSEY.

GRAIN-WINNOWER.

SPECIFICATION forming part of Letters Patent No. 312,929, dated February 2%, 1885.

Application filed June 18,1884. (No model.)

To an 1071,0120 it may concern:

Be it known that I, ADAM STROTI, of New Brunswick, in the State of New Jersey, have invented certain new and useful Improvements in GrainWVinnowers, of which the following is a specification.

This invention has reference to certain improvements in grain winnowers or machines for separating grain from chaff, seeds, and other like impurities; and the invention 0011- sists of a grain-winnower embodying certain details of construction, which will be described hereinafter, and finally be pointed out in the claim.

In the accompanying drawings, Figure 1 represents a side elevation; Fig. 2, a side elevation of the opposite side of the machine. partly in Vertical longitudinal section; and Fig. 3 is an end elevation of the machine.

Similar letters of reference indicate corre sponding parts.

A in the drawings represents the mainframe or casing of my improved grain-winnowcr, and B B the uprights which supports the same. The uprights B B are connected at the top and bottom by transverse brace-pieces B A hopper, O, is located at the top of the casing A and provided at one side with an adj nstable slide, 0, for regulating the supply of grain to the machine.

Below the hopper G is suspended an inclined bottom, D, that has upright walls at the sides and rear end, and a tapering front edge, to which latter is rigidly applied a screen, D, that forms an extension of the conveying-bottom D. The screen Dis suspended by straps d from a transverse shaft, cl, the straps being made longer or shorter by being wound up or unwound from the shaft d,wl1ich is retained in position by a ratchet-wheel, (Z and pawl d", arranged at the outside of the supporting-casing A. The rear end of the bottom D is suspended by hooks a and eyes a from thelower part of the hopper O, as shown in Fig. 2. By the adjustable straps d the screen D can be adjusted to a greater or smaller inclination according to the quality and speed of the grain to be passed over the same. The screen D receives laterally-oscillatin g motion from a curved rod, 6, attached thereto, which rod passes to the outside of the casing A, and is hinged to a short crank, e, of a vertical shaft, 6", that is supported in bearings attached to the outside of the casing, as shownin Fig. 1. Aseeond connecting-rod, 6, extends from a crank, c, on the shaft 6 to a short crank, e, on the shaft of aventilatingfan, E, that is arranged in a semicircular portion, A, at one end of the casing A. The grain drops from the laterally oscillating screen D onto an inclined conveying-board, F, which consists of a fixed part, f, and an adjustable part, f, which latter is guided between the fixed part f and guide-strips f so that it can be adjusted higher or lower, as required. The adjustable board f is provided at its upper end, and at one side thereof, with teeth which are engaged by a check-pawl, f

Parallel to, and at some distance from the inclined board F, is arranged a second inclined board, F, that extends to a greater height than the board F, and which is also composed of a fixed part, ffland adj ustable part The second inclined board, F, is tightly clamped between the side walls of the supporting-casing A by means of a transverse rod, j, which has a head, f at one end anda winged screwnut, at the opposite end. f on being screwed up on the rod f draws the side walls close together and holds the adjustable part f reliably in the position to which it has been adjusted. The second board, F, communicates with a laterally-id clined discharge-spout, F that terminates at one side of the casing and conveys the grain into a suitable receptacle.

At the lower edge of the inclined board F is arranged a second inclined shaking screen, G, which is guided along fixed side strips, 9 g, and supported at its lower end on a transverse anti-friction roller, 9, the shaft of which is supported in brackets g of the uprights B. The upper end of the screen G rests by a central rack-bar, Z-on a pinion, g, of a trans verse shaft, 9", which turns in bearings of angular straps 9 attached to the side walls of the casing A. To the outer end of the shaft- 9 is keyed a crank, to holes of which the connecting-rod g is adjustably attached. Th rod connects with a short crank, 9 on the The screw-nut shaft of the fan E, as shown in Fig. 1. The

. shaft g and its pinion g receive rotary reciprocating motion from the fan-shaft, and

impart, consequently, by the rack-bar 9 a longitudinally reciprocating motion to the screen G. The lower end of the reciprocating screen G discharges the grain at the end of the machine into a suitable receptacle. The fan receives rotary motion from a handcrank and gear-wheel transmission, as shown in Figs. 2 and 3. The grain, which is conveyed from the hopper O to the first shakingscreen, D, is exposed to the current of air generated by the fan as it drops from the screen, so that the chaff, seeds, and other impurities are separated therefrom and blown oft at the open end of the machine, which is located opposite to the closed end where the fan is located. By adjusting the screen D higher or lower, the speed by which the grain passes over the same is regulated according to the quality of the same. The heavier grain,which passes through and over the screen,is'c0nducted along the inclined hoard F to the second screen,G, at the bottom of the machine, while thelighter grain, that is carried along by the current of air, is blown against the upwardlyeXtended board F, and passed down along the same to the lateral discharge-spout F The inner inclined board, F, serves to sepa rate the heavier from the lighter grain. When the heaviest kind of grain, which is preferahly used for seeding, is desired to be separated, the inclined board F is adjusted to its lowermost position by the check-pawl and rack.

The machine is provided at both ends with handles A for being readily lifted, and at the lower end of the uprights B with rollers,which latter facilitate the moving of the machine from place to place.

The advantages of my improved grain-winnower are that the construction is simple and comparatively inexpensive; that it can be readily adjusted so as to separate the different kinds and qualities of grain from the chaff 5 a and like impurities, and that the machine works quickly and reliably and without loss of grain.

Having thus described my invention,I clai m' as new and desire to secure by Letters Patent- The herein-described grain-winnower, comprising the casing, the hopper, the inclined bottom D,hinged to said hopper, the adjustalole shaking screen D, the lower screen, G, provided with a rack near one end, the antifriction roller 9, supporting the opposite end of said screen, the inclined adjustable board F,leading from the lower end of said screen D to the upper end of said screen G, the blower E, the shaft of which is provided with two cranks, the vertical crank-shaft 6 connected to the upper screen, D, the transverse shaft g,supporting one end of the lower screen,and provided with a-pinion, g, which takes into the rack thereof, the slotted arm 9 attached to said transverse shaft, and the pitmen connecting, respectively, said vertical crank-shaft e and said slotted arm with the cranks of the blower-shaft, whereby, simultaneously,

laterallyreciprocating motion is imparted to 0 said upper screen, D, and vertically-reciprocating motion to said lower screen, G, substantially as described.

In testimonythat I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

' AD. STROTT. Witnesses:

O. W. KENT, JAMES H. Van CLEEF. 

